单项选择题

The writer implies that______.

A．the detective' s search took five days
B．the Gloritania was about to leave New York
C．the ship' s captain refused to cooperate
D．most New Yorkers are bald

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热门试题

单项选择题

One benefit the author mentions is that the system______.

A．uses no electricity
B．has a fire-safety shutoff
C．does not pollute the air in the house
D．pollute the air in house

单项选择题

The passage suggests that the author' s heat-pump system absorbs heat from ______.

A．soil in a nearby field
B．sun panels at ground level
C．a pipe buried next to the walls
D．a tank of propylene glycol